<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>12306</title>
</head>
<body>
https://www.baidu.com/baidu?tn=monline_4_dg&ie=utf-8&wd=12306
<from name="name1" action="https://www.baidu.com/s" method="get">
    <input type="text" name="wd" placeholder="请输入关键字"/>
    <input type="submit" value="百度一下"/>
</from>
</body>
</html>